| Marketed | April 1987 |
| Original Price | 104,000 yen (w/case, built-in hood) |
| Lens Construction (group) | 7 |
| Lens Construction (element) | 8 |
| No. of Diaphragm Blades | 5 |
| Minimum Aperture | 22 |
| Closest Focusing Distance (m) | 0.2 |
| Maximum Magnification (x) | 0.14 |
| Filter Diameter (mm) | — |
| Maximum Diameter x Length (mm) | 73 x 62.2 |
| Weight (g) | 330 |
A full-frame fisheye lens with 180° diagonal angle of view. Unlike other AF (autofocusing) SLR lenses, close auto focusing is possible to a distance of 0.2m, enabling the creation of powerful images using the exaggerated near-far relationship and pan-focus effects characteristic of a fisheye lens. Despite being a fisheye lens, straight lines running through the center remain undistorted. The AF is driven by an AFD (Arc-Form Drive). This lens uses rear drop-in type gelatin filters, up to 3 filters at the same time.